Of course without a wideband! I mean are there any tale signs that one is running too lean to be a problem?
Thanks

 

Check your spark plugs.

 

Depending on where in the powerband you're running lean, you might experience snatchy throttle response, and/or you may feel like you're not pulling on top like you think you should.
Once again depending on where you're lean

 

tap an EGT sensor in your exhaust manifold

 

get dyno'd and have them use a afr on the back of your exhaust.

 

your engine goes boom.

You're on a very thin ice if you're tuning without a wideband man.

 

I am not tuning for sure
I have a stage I ACN AP map on the MR with a HKS drop in. The car feels the best with the regular stage I map and the drop in (which I tried accidentally not realizing I had flashed the wrong map), followed by the ACN map for CA and the drop in, next with the ACN map and the reg filter and lastly the regular MR without a tune. Rob at Cob is going to test the stage I with the HKS soon and releasr the data to us, but I was just wondering since in my driving I notice NO issues at all. If anything the car with the first setup pulls the hardest and sounds wonderful while making power all the way up top ( which I do rarely anyways) and feels lively in the lower RPM range. The stock MR map, on the other hand, makes a lot of noise up top and doesn't go anywhere.
That why I was asking.

 

just use a wideband. if you dont have experience reading plugs them just get a gauge

 

AEM Wideband is a great pruduct

 

The stock mapping on cars is almost always hideously fat on top. They do this thinking it'll minimize warranty claims. The feedback you'd get from the car would be no pull in that area.

 

anyone try using evoscan yet?

 

I heard they are waiting on the ECU from a X to tinker with. And a member i think sent theirs in, we should hear from them or the member soon i guess.